Samsung Galaxy S3 Battery Case with Build-in Bluetooth Headset -Hard Slim Luxury Case- Rechargeable Extended Battery Pack - Best Latest Stylish All in One Design - Perfect Custom Fit - For Girls & Guys - AT&T Verizon Sprint Unlocked - Black (Black) This product is designed to fit perfectly with Samsung Galaxy S3. Extend usage time. Battery Capacity: 2100mAh. Built-in bluetooth headset helps distance yourself from phone radiation. Charge your bluetooth headset on the go. Ultra Light and Slim Design! Only 3oz !